How can I install AUR packages during system installation?

Hi,I would like to automate the installation of Arch via meta packages. Therefore, I defined a meta package that contains all packages that I want to have in my installation as dependencies. During the system installation I call pacstrap for this meta package. This works quite will unless there are no dependencies to AUR packages. If that's the case pacstrap throws an error message like "could not resolve dependencies" . My question: How can I install AUR packages during the initail system installation.Thanks, mipi